97 1500 5.7 weird spark problem. Help
#1
97 1500 5.7 weird spark problem. Help
Hi all. Well this thing is the multiport (poppet) injection. It is very weird. Just driving and it popped and died. Won't start again. It acts like it is out of time, turning hard. I checked and it has fuel pressure and holds it. I checked the spark and it has good spark from the coil wire. The problem is that it isn't getting spark at the plugs. I installed a new cap and rotor and wires and plugs. It fires at the plugs like 2 or 3 times and then stops firing. when I check at the coil wire it is firing. I installed a new ignition control module. Still the same thing. Spark at the coil wire, fires like 2 or 3 times at the plug and then stops firing. Any help here would be really appreciated. I am stumped and getting broke from all these dealer parts. So that's my story and I'm sticking to it. Thanks for any info people.
#3
Computer can disable ignition but you would not get spark at the coil. (am assuming you use the center wire from the cap, also assuming you still get coil spark after it quits at the plugs).
Do you have any codes?, like cam sensor? Crank position sensors are known to quit after a few minutes, or seconds, of running but you should have a code.
Check to make sure the rotor is pointed at the #1 wire post when #1 is at the timing mark near TDC. If it is half way between wire posts spark can't jump the gap and it has jumped time somehow. Also look to see if the impulse lobe is lined up with the sensor.
Do you have any codes?, like cam sensor? Crank position sensors are known to quit after a few minutes, or seconds, of running but you should have a code.
Check to make sure the rotor is pointed at the #1 wire post when #1 is at the timing mark near TDC. If it is half way between wire posts spark can't jump the gap and it has jumped time somehow. Also look to see if the impulse lobe is lined up with the sensor.
#6
You guys were right on. The distributor gear was bad. It was deceiving. I checked the distributor timing the very first thing and it was on. When I checked it again yesterday I had a different person turning the key to get it into tdc and noticed it jumping up and not moving. When I got it to tdc, the rotor was way off this time. So I yanked the distributor and the gear was fried. Thank goodness the gear on the cam looks good. I did notice that the entire new distributor seems to wobble a lot. The intake looks fine though. What a screwy design. It runs great though. Thank you for your help.
Thread
Thread Starter
Forum
Replies
Last Post
stdhawaii60
Express, Savana & G-Series Vans
2
December 24th, 2010 11:14 AM
pabes
Silverado, Sierra & Fullsize Pick-ups
2
November 5th, 2008 5:30 PM
richardbentz
General Tech
7
August 13th, 2006 12:39 AM